Tandem Diabetes Care, Inc. (NASDAQ:TNDM – Get Free Report) saw unusually large options trading on Monday. Tandem Diabetes Care Stock Up 3.8%Shares of NASDAQ TNDM traded up $0.75 during mid-day trading on Monday, hitting $20.25. Tandem Diabetes Care has a 52 week low of $9.98 and a 52 week high of $29.65. Get Tandem Diabetes Care alerts:Tandem Diabetes Care (NASDAQ:TNDM – Get Free Report) last posted its quarterly earnings data on Thursday, May 7th. Featured ArticlesReceive News & Ratings for Tandem Diabetes Care Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Tandem Diabetes Care and related companies with MarketBeat.com's FREE daily email newsletter.